OT: Amusing Google conversion of the week

OK. I give up. It that supposed to make sense?

Neato..Gee don't stop there... I tried these..

0.08 (square millimeters) = 29.4018229 miles per US gallon 0.08 (mm^2) = 7.7671399 miles per liter 0.08 (mm^2) = 0.0382836236 miles per US teaspoon 0.08 (millimeters^2) = 12.5 kilometers per liter

0.08 (mm^2) = 12 500 millimeters per milliliter

0.08 (mm^2) = 61 611 519.9 microns per US teaspoon

D from BC myrealaddress(at)comic(dot)com British Columbia Canada

Sure, fuel consumption has units of area, right?

mpg is proportional to the reciprocal.

Best regards, Spehro Pefhany

--
"it\'s the network..."                          "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

It seems to be reading mm^2 for L/km, which give the same result. In that correct result, it automatically accounts for L/km mapping to mpg, despite the inversion.

--
John

Oh! Of course, it's right - L/km is identical to mm^3/mm, and that is mm^2. Sort of. So fuel consumption does in fact have units of volume/length, which is area.

--
John

I always suspected you have far too much time on your hands ;-)

Dimensionally sound. Presumably four cylinders?

That is *so* counter-intuitive. But correct. My heard hurts. Thanks... I think. :-)

--
Michael

"Spehro Pefhany" wrote

mm^2 = area

miles/gallon = distance/volume = 1/area

gallons/mile = volume/distance = area

Google gives:

0.08 (mm^2) = 29.4018229 miles per US gallon

and

0.08 (mm^2) = 0.0340114966 US gallons per mile

Surely only the latter is valid? What am I missing?

Do the math. What's 29.4018229 * 0.0340114966?

Good Luck! Rich

Surely you mean fuel consumption has units of length/volume?

Example:

30 miles/gal x 1609 m/mile x 264 gal/m^3 = 12.7E6 m^(-2)

Michael

That's the reciprocal-- what they call "fuel economy". A bigger number implies higher efficiency.

Gotcha. Fuel consumption = gallons per mile = 1/mpg... the smaller the better... mpg: the larger the better... I'm feeling silly now... ;)

M

Glad to be of service. ;-)

For more laughs: since 1 US gallon of gasoline = 1.3E8 Joules, and W = E = (F)(d), then [volume of gasoline] / [distance] = force. So [fuel economy] = [Newtons]

Oh joy!

Michael

dependant on the efficiency of the engine.

this same unit as friction, which makes sense.

That is odd, i have the idea that friction is force over force (or unitless).

force.

Friction is a force.

[1913 Webster]: The resistance which a body meets with from the surface on which it moves. It may be resistance to sliding motion, or to rolling motion.

I was using (perhaps misusing) it to mean all the forces that resist the motion of the vehichle (drivetrain losses, atmospheric drag, etc..)

you are thinking of "coefficient of friction" which measures is a property of many pairs of surfaces that friction is linearly dependant on the contact force.